Twenty-eight ishvaris 二十八自在母

The twenty-eight ishvaris (Skt. īśvarī; Tib. wangchukma nyer gyé; Wyl. dbang phyug ma nyer brgyad) are found in Mahayoga mandalas, such as the fifty-eight wrathful deities, and are also considered to be samaya-bound guardians in forms brought about by their own past actions. Yukhok Chatralwa Chöying Rangdrol explains the latter term by saying that such guardians "transcend the world and yet still appear in worldly forms created by their past karma and disturbing emotions like ordinary worldly beings. For example, when Vajra Manushya Rakshasi was the wife of Ravana, king of the Rakshasas, she had the face of a rakshasi, but then when she was abducted by Rudra, she transformed her rakshasi face into that of a yak."

The twenty-eight ishvaris are composed of four groups of six yoginis corresponding to the four activities, and of the four female outer-gate keepers:

相應於［息增懷誅］四事業的四類瑜伽母，各有六位，再加上四位外門的守護母，共計廿八位自在母

1. The six yoginis corresponding to the activity of pacifying:

• Rakshasi (white)
• Brahmi
• Mahadevi
• Lobha
• Kumari
• Indrani

2. The six yoginis corresponding to the activity of increasing:

• Vajra
• Shanti
• Amrita
• Chandra
• Danda
• Rakshasi (dark yellow)

3. The six yoginis corresponding to the activity of magnetizing:

• Bhakshini
• Rati
• Mahabala
• Rakshasi (pale red)
• Kama
• Vasuraksha

4. The six yoginis corresponding to the activity of subjugating:

• Vayudevi
• Nari
• Varahi
• Nanda
• Mahahastini
• Varunadevi

5. The last group is composed of the four female outer-gate keepers.